JPS6129828Y2 - - Google Patents
Info
- Publication number
- JPS6129828Y2 JPS6129828Y2 JP15467080U JP15467080U JPS6129828Y2 JP S6129828 Y2 JPS6129828 Y2 JP S6129828Y2 JP 15467080 U JP15467080 U JP 15467080U JP 15467080 U JP15467080 U JP 15467080U JP S6129828 Y2 JPS6129828 Y2 JP S6129828Y2
- Authority
- JP
- Japan
- Prior art keywords
- underground
- propulsion
- propulsion device
- hole
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Earth Drilling (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15467080U JPS6129828Y2 (en, 2012) | 1980-10-28 | 1980-10-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15467080U JPS6129828Y2 (en, 2012) | 1980-10-28 | 1980-10-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5779687U JPS5779687U (en, 2012) | 1982-05-17 |
| JPS6129828Y2 true JPS6129828Y2 (en, 2012) | 1986-09-02 |
Family
ID=29513892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15467080U Expired JPS6129828Y2 (en, 2012) | 1980-10-28 | 1980-10-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6129828Y2 (en, 2012) |
-
1980
- 1980-10-28 JP JP15467080U patent/JPS6129828Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5779687U (en, 2012) | 1982-05-17 |
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